Development of a head-mounted visual enhancement device for people with low vision

To develop the head mounted visual enhancement device (HMVED), we have suggested five methods for visual acuity enhancement such as image magnification, effects of viewing axis control, wavelength control of light source, and effects of power control of light source and focal length control. In addition, the mobility and convenience of the HMVED should be considered. The HMVED consists of a 0.44" high quality TFT Color LCD (active dots: 800(H)×225(V)), a magnifier lens, a TFT color LCD back light, a prism and a diopter lens. The LCD is used to display the magnified image by a magnifying lens. The backlight can be controlled by the intensity and color light source. The prism can refract the viewing axis. The basic clinical experiments of the HMVED have been performed at Low Vision Device Company in Korea. The results show beneficiary effects on people with low vision.